package net.minecraft.block;

import com.google.common.base.Predicate;
import java.util.List;
import java.util.Random;
import net.minecraft.block.material.Material;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyBool;
import net.minecraft.block.properties.PropertyEnum;
import net.minecraft.block.state.BlockState;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.item.EntityItemFrame;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.tileentity.TileEntityComparator;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.IStringSerializable;
import net.minecraft.util.StatCollector;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

public class BlockRedstoneComparator extends BlockRedstoneDiode implements ITileEntityProvider {
	public static final PropertyBool POWERED = PropertyBool.create("powered");
	public static final PropertyEnum<BlockRedstoneComparator.Mode> MODE = PropertyEnum.<BlockRedstoneComparator.Mode>create(
			"mode", BlockRedstoneComparator.Mode.class);

	public BlockRedstoneComparator(boolean powered) {
		super(powered);
		this.setDefaultState(this.blockState.getBaseState().withProperty(FACING, EnumFacing.NORTH)
				.withProperty(POWERED, Boolean.valueOf(false))
				.withProperty(MODE, BlockRedstoneComparator.Mode.COMPARE));
		this.isBlockContainer = true;
	}

	/**
	 * Gets the localized name of this block. Used for the statistics page.
	 */
	public String getLocalizedName() {
		return StatCollector.translateToLocal("item.comparator.name");
	}

	/**
	 * Get the Item that this Block should drop when harvested.
	 */
	public Item getItemDropped(IBlockState state, Random rand, int fortune) {
		return Items.comparator;
	}

	public Item getItem(World worldIn, BlockPos pos) {
		return Items.comparator;
	}

	protected int getDelay(IBlockState state) {
		return 2;
	}

	protected IBlockState getPoweredState(IBlockState unpoweredState) {
		Boolean obool = (Boolean) unpoweredState.getValue(POWERED);
		BlockRedstoneComparator.Mode blockredstonecomparator$mode = (BlockRedstoneComparator.Mode) unpoweredState
				.getValue(MODE);
		EnumFacing enumfacing = (EnumFacing) unpoweredState.getValue(FACING);
		return Blocks.powered_comparator.getDefaultState().withProperty(FACING, enumfacing).withProperty(POWERED, obool)
				.withProperty(MODE, blockredstonecomparator$mode);
	}

	protected IBlockState getUnpoweredState(IBlockState poweredState) {
		Boolean obool = (Boolean) poweredState.getValue(POWERED);
		BlockRedstoneComparator.Mode blockredstonecomparator$mode = (BlockRedstoneComparator.Mode) poweredState
				.getValue(MODE);
		EnumFacing enumfacing = (EnumFacing) poweredState.getValue(FACING);
		return Blocks.unpowered_comparator.getDefaultState().withProperty(FACING, enumfacing)
				.withProperty(POWERED, obool).withProperty(MODE, blockredstonecomparator$mode);
	}

	protected boolean isPowered(IBlockState state) {
		return this.isRepeaterPowered || ((Boolean) state.getValue(POWERED)).booleanValue();
	}

	protected int getActiveSignal(IBlockAccess worldIn, BlockPos pos, IBlockState state) {
		TileEntity tileentity = worldIn.getTileEntity(pos);
		return tileentity instanceof TileEntityComparator ? ((TileEntityComparator) tileentity).getOutputSignal() : 0;
	}

	private int calculateOutput(World worldIn, BlockPos pos, IBlockState state) {
		return state.getValue(MODE) == BlockRedstoneComparator.Mode.SUBTRACT
				? Math.max(this.calculateInputStrength(worldIn, pos, state) - this.getPowerOnSides(worldIn, pos, state),
						0)
				: this.calculateInputStrength(worldIn, pos, state);
	}

	protected boolean shouldBePowered(World worldIn, BlockPos pos, IBlockState state) {
		int i = this.calculateInputStrength(worldIn, pos, state);

		if (i >= 15) {
			return true;
		} else if (i == 0) {
			return false;
		} else {
			int j = this.getPowerOnSides(worldIn, pos, state);
			return j == 0 ? true : i >= j;
		}
	}

	protected int calculateInputStrength(World worldIn, BlockPos pos, IBlockState state) {
		int i = super.calculateInputStrength(worldIn, pos, state);
		EnumFacing enumfacing = (EnumFacing) state.getValue(FACING);
		BlockPos blockpos = pos.offset(enumfacing);
		Block block = worldIn.getBlockState(blockpos).getBlock();

		if (block.hasComparatorInputOverride()) {
			i = block.getComparatorInputOverride(worldIn, blockpos);
		} else if (i < 15 && block.isNormalCube()) {
			blockpos = blockpos.offset(enumfacing);
			block = worldIn.getBlockState(blockpos).getBlock();

			if (block.hasComparatorInputOverride()) {
				i = block.getComparatorInputOverride(worldIn, blockpos);
			} else if (block.getMaterial() == Material.air) {
				EntityItemFrame entityitemframe = this.findItemFrame(worldIn, enumfacing, blockpos);

				if (entityitemframe != null) {
					i = entityitemframe.func_174866_q();
				}
			}
		}

		return i;
	}

	private EntityItemFrame findItemFrame(World worldIn, final EnumFacing facing, BlockPos pos) {
		List<EntityItemFrame> list = worldIn.<EntityItemFrame>getEntitiesWithinAABB(EntityItemFrame.class,
				new AxisAlignedBB((double) pos.getX(), (double) pos.getY(), (double) pos.getZ(),
						(double) (pos.getX() + 1), (double) (pos.getY() + 1), (double) (pos.getZ() + 1)),
				new Predicate<Entity>() {
					public boolean apply(Entity p_apply_1_) {
						return p_apply_1_ != null && p_apply_1_.getHorizontalFacing() == facing;
					}
				});
		return list.size() == 1 ? (EntityItemFrame) list.get(0) : null;
	}

	public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn,
			EnumFacing side, float hitX, float hitY, float hitZ) {
		if (!playerIn.capabilities.allowEdit) {
			return false;
		} else {
			state = state.cycleProperty(MODE);
			worldIn.playSoundEffect((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D,
					"random.click", 0.3F, state.getValue(MODE) == BlockRedstoneComparator.Mode.SUBTRACT ? 0.55F : 0.5F);
			worldIn.setBlockState(pos, state, 2);
			this.onStateChange(worldIn, pos, state);
			return true;
		}
	}

	protected void updateState(World worldIn, BlockPos pos, IBlockState state) {
		if (!worldIn.isBlockTickPending(pos, this)) {
			int i = this.calculateOutput(worldIn, pos, state);
			TileEntity tileentity = worldIn.getTileEntity(pos);
			int j = tileentity instanceof TileEntityComparator ? ((TileEntityComparator) tileentity).getOutputSignal()
					: 0;

			if (i != j || this.isPowered(state) != this.shouldBePowered(worldIn, pos, state)) {
				if (this.isFacingTowardsRepeater(worldIn, pos, state)) {
					worldIn.updateBlockTick(pos, this, 2, -1);
				} else {
					worldIn.updateBlockTick(pos, this, 2, 0);
				}
			}
		}
	}

	private void onStateChange(World worldIn, BlockPos pos, IBlockState state) {
		int i = this.calculateOutput(worldIn, pos, state);
		TileEntity tileentity = worldIn.getTileEntity(pos);
		int j = 0;

		if (tileentity instanceof TileEntityComparator) {
			TileEntityComparator tileentitycomparator = (TileEntityComparator) tileentity;
			j = tileentitycomparator.getOutputSignal();
			tileentitycomparator.setOutputSignal(i);
		}

		if (j != i || state.getValue(MODE) == BlockRedstoneComparator.Mode.COMPARE) {
			boolean flag1 = this.shouldBePowered(worldIn, pos, state);
			boolean flag = this.isPowered(state);

			if (flag && !flag1) {
				worldIn.setBlockState(pos, state.withProperty(POWERED, Boolean.valueOf(false)), 2);
			} else if (!flag && flag1) {
				worldIn.setBlockState(pos, state.withProperty(POWERED, Boolean.valueOf(true)), 2);
			}

			this.notifyNeighbors(worldIn, pos, state);
		}
	}

	public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand) {
		if (this.isRepeaterPowered) {
			worldIn.setBlockState(pos, this.getUnpoweredState(state).withProperty(POWERED, Boolean.valueOf(true)), 4);
		}

		this.onStateChange(worldIn, pos, state);
	}

	public void onBlockAdded(World worldIn, BlockPos pos, IBlockState state) {
		super.onBlockAdded(worldIn, pos, state);
		worldIn.setTileEntity(pos, this.createNewTileEntity(worldIn, 0));
	}

	public void breakBlock(World worldIn, BlockPos pos, IBlockState state) {
		super.breakBlock(worldIn, pos, state);
		worldIn.removeTileEntity(pos);
		this.notifyNeighbors(worldIn, pos, state);
	}

	/**
	 * Called on both Client and Server when World#addBlockEvent is called
	 */
	public boolean onBlockEventReceived(World worldIn, BlockPos pos, IBlockState state, int eventID, int eventParam) {
		super.onBlockEventReceived(worldIn, pos, state, eventID, eventParam);
		TileEntity tileentity = worldIn.getTileEntity(pos);
		return tileentity == null ? false : tileentity.receiveClientEvent(eventID, eventParam);
	}

	/**
	 * Returns a new instance of a block's tile entity class. Called on placing the
	 * block.
	 */
	public TileEntity createNewTileEntity(World worldIn, int meta) {
		return new TileEntityComparator();
	}

	/**
	 * Convert the given metadata into a BlockState for this Block
	 */
	public IBlockState getStateFromMeta(int meta) {
		return this.getDefaultState().withProperty(FACING, EnumFacing.getHorizontal(meta))
				.withProperty(POWERED, Boolean.valueOf((meta & 8) > 0)).withProperty(MODE,
						(meta & 4) > 0 ? BlockRedstoneComparator.Mode.SUBTRACT : BlockRedstoneComparator.Mode.COMPARE);
	}

	/**
	 * Convert the BlockState into the correct metadata value
	 */
	public int getMetaFromState(IBlockState state) {
		int i = 0;
		i = i | ((EnumFacing) state.getValue(FACING)).getHorizontalIndex();

		if (((Boolean) state.getValue(POWERED)).booleanValue()) {
			i |= 8;
		}

		if (state.getValue(MODE) == BlockRedstoneComparator.Mode.SUBTRACT) {
			i |= 4;
		}

		return i;
	}

	protected BlockState createBlockState() {
		return new BlockState(this, new IProperty[] { FACING, MODE, POWERED });
	}

	/**
	 * Called by ItemBlocks just before a block is actually set in the world, to
	 * allow for adjustments to the IBlockstate
	 */
	public IBlockState onBlockPlaced(World worldIn, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ,
			int meta, EntityLivingBase placer) {
		return this.getDefaultState().withProperty(FACING, placer.getHorizontalFacing().getOpposite())
				.withProperty(POWERED, Boolean.valueOf(false)).withProperty(MODE, BlockRedstoneComparator.Mode.COMPARE);
	}

	public static enum Mode implements IStringSerializable {
		COMPARE("compare"), SUBTRACT("subtract");

		private final String name;

		private Mode(String name) {
			this.name = name;
		}

		public String toString() {
			return this.name;
		}

		public String getName() {
			return this.name;
		}
	}
}
